geojson-bounds

Dependency-free methods for extracting the extent, envelope, minimum latitude, minimum longitude, maximum latitude, and maximum longitude from a valid GeoJSON representation.

Designed to follow PostGIS's conventions for these operations as much as possible.

Install

npm install geojson-bounds

Example usage

var st = require('geojson-bounds');

var shape = { "type": "Polygon",
  "coordinates": [
    [ [100.1, 0.1], [101.0, 0.1], [101.0, 1.0], [100.1, 1.0], [100.1, 0.1] ],
    [ [100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2] ]
  ]
}

st.extent(shape)
// => [ 100.1, 0.1, 101, 1 ]

st.envelope(shape)
// => {"type":"Feature","properties":{},"geometry":{"type":"Polygon","coordinates":[[[100.1,0.1],[100.1,1],[101,1],[101,0.1],[100.1,0.1]]]}}

st.xMin(shape)
// => 100.1

st.xMax(shape)
// => 101

st.yMin(shape)
// => 0.1

st.yMax(shape)
// => 1

API

.extent(geojson)

Returns an array of coordinates in the order [West, South, East, North] that represents the extent of the provided feature or geometry.

.envelope(geojson)

Returns a GeoJSON Feature polygon that repesents the bounding box of the provided feature or geometry.

.xMin(geojson)

Returns the western-most longitude of the provided feature or geometry.

.xMax(geojson)

Returns the eastern-most longitude of the provided feature or geometry.

.yMin(geojson)

Returns the southern-most latitude of the provided feature or geometry.

.yMax(geojson)

Returns the northern-most latitude of the provided feature or geometry.

Licenese

CC-BY-4.0 for all code unique to this repository